49 times 71 is 3479, but what is the answer if both 49 and 71 are negative numbers? Here we will determine if the answer to negative 49 times negative 71 is positive 3479 or negative 3479.
There are many different ways to explain and determine if the answer to negative 49 times negative 71 is -3479 or +3479 using mathematical terms such as additive inverse and mathematical laws like the Distribute Law.
We will take a different approach - process of elimination: We will simply test if -3479 is the correct answer using basic algebra.
We will test if -3479 is correct by setting up the equation negative 49 times negative 71 equals negative 3479, and then simplifying the equation to see if it is true.
(-49) (-71) = (-3479)
Divide both sides of the equation by (-71) :
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| = |
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The numerator and denominator on the left side both have (-71) which even each other out and can be removed:
| (-49) = |
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The numerator and denominator on the right side both have a minus sign (-) which even each other out and can be removed:
| (-49) = |
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A numerator of 3479 and denominator of 71 on the right side is the same as 3479 divided by 71 which is 49. Now we end up with this untrue equation:
(-49) = (49)
-49 is NOT equal to 49, thus we have proven that negative 49 times negative 71 is not equal to -3479. The answer must therefore be 3479:
-49 x -71 = 3479
The above applies to all math problems where you multiply two negative numbers. Multiplying two negative numbers such as negative 49 times negative 71 will always have a positive answer.
Negative Times Negative Calculator
Here you can multiply another two negative numbers together.
What is negative 49 times negative 72?
Here is the next problem on our list that we have explained and calculated.
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